'use strict'

class content {

  constructor () {
    //param默认就是/:id，若要改变路由，则可以设置此属性，比如设置为/:name
    //this.param = '/:id'
  }

  __mid () {
    return [
      {
        name: 'token-verify',
        path: ['post', 'delete']
      }
    ]
  }
  
  //以下方法，若不需要，要去掉，避免无意义的路由。

  //获取资源具体内容
  //对应路由 GET /content/:id
  async get (c) {
    let id = c.param.id

    let sqltext = 'SELECT id,detail,title, update_time '
        + ' FROM content WHERE id=$1';

    let r = await c.service.psql.query(sqltext, [ id ])

    if(r.rowCount === 0) {
        return c.status(404).send('not found');
    }

    c.send(r.rows[0])
  }

  //创建资源
  //对应路由 POST /content
  async post (c) {
    try{
      //c.body是提交的请求数据
      let data = JSON.parse(c.body)
      let spltext = 'INSERT INTO content'
          + '(id, detail, title, add_time, update_time)'
          + ' VALUES($1, $2, $3, $4, $5)'
      
      // 随机数转成16进制字符串并去掉前两位，字串作为ID
      let id = Math.random().toString(16).substring(2)
      let tm = Date.now()

      let r = await c.service.psql.query(spltext, [
          id, data.detail, data.title, tm, tm
      ])

      if(r.rowCount === 0) {
          return c.status(500).send('failed')
      }

      c.send(id)

    } catch (err) {
        console.error(err)
        c.status(400).send('bad data')
    }
  }

  //更新资源
  //对应路由 PUT /content/:id
  async put (c) {

  }

  //获取列表
  //对应路由 GET /content
  async list (c) {
    let sqltext = 'SELECT id, title, update_time FROM content'
    let r = await c.service.psql.query(sqltext)

    c.send(r.rows)
  }

  //删除资源
  //对应路由 DELETE /content/:id
  async delete (c) {
    let r = await c.service.psql.query(`DELETE FROM content WHERE id=$1`,
      [c.param.id]
    )
    c.send({
      count: r.rowCount
    })
  }

}

module.exports = content
